Mechanical filter.



J. G. BREWER.

MECHANICAL FILTER.

APPLIOATION FILED JULY 28,1908.

9 S HEBTS-SHEET l.

Patented May 11, 1909.

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INVENTOR WJTNES J. G. BREWER. MECHANICAL FILTER.

APPLIOATIDN FILED JDTLY 28,1903.

atented May 11, 1909.

9 SHEETS-SHEBT 2.

J G. BREWER.

MECHANICAL FILTER. APPLICATION-FILED JULY 28,1908:

Patented May 11, 1909.

9 SHEETS-SHEET 3.

' WJTN Z Alfarnkys TH: n'aRRls PETERS co.. WASHINGTON, L c.

J. (.;BREWEB. f MECHANICAL FILTER.

APPLIUA'IION FILED JULY 28, 1908. Patented May 11 '9 SHEETS-SHEET 4.

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J. G. BREWER. MEGHANIGAL FILTER.

APPLIOATION IILED JULY 28 1908. 920,909.--

Patented May 11, 1909.

9 SHEETS-SHEET 6.

14 flomeyJ J. G. BREWER. MEOHANIOAL FILTER.

APPLICATION FILED JUL? 28, 190B. May 11 8 SHEETS-SHEET 6- WITNESINVENTOk Altameys THI. umuus PETER! co, wnsnmaron. n. c.

J. G. BREWER.

MECHANICAL FILTER.

APPLIUATION FILED JULY 28,1908.

920,909. Patented May 11,1909.

9 SHEETS-SHEET 7.

' .l ll i; munmmul E i r i iEiiiiiEv II! INVENTOR J. G. BREWER.MECHANICAL FILTER. APPLICATION FILED JULY 28, 1908.

920,909. Patented May 11, 1909.

9 BHEETS-SHEET 8.

INVENTOR Allomey;

J. G. BREWER. MEOHANIGAL FILTER.

' APPLICATION FILED JULY 23, 1906. 920,909, Patented May 11, 1909'.

9 SHEETS-SHEET 9.

WITNES INVENTOR Attoingw,

UNITED s'rATEs Parana EEEQ.

.JOHN G. BREWER, 0F RAQELli-ND, LOUISIANA.

MEoiiANIoAL FILTER.

Specification of Letters Patent.

Patented May 11, 1909.

Application filed July 28, 1908. Serial No. 445,785.

the art to which it appertainsto make anduse the same. I

My invention relates to improvements in mechanical filters and isparticularly adapted for use in sugar and cotton seed oil mills. It is,however, not restricted to these uses, as being purely a mechanicalfilter it is adapted for filtering all kinds of'solutions.

The object of my invention is to produce a mechanically operated filterpump, through which an endless strip of filtering material travels atintervals, the pump being provided with a movable head, so that afterone charge of liquid has been filtered, the strip of filtering materialmay be moved forward toexpose a clean surface for the next charge ofliquid. The roll of filtering material is automatically washed and driedand the movements of the pump piston, the pump head and the filteringcorrelated so that each will take place at the proper'time.

Further objects will appearinthe detailed description. In theaccompanying drawingsFigures 1 and l, which are to be taken together,represent my invention in side elevation. Figs 2 and 2 which are to betaken together, represent my invention in plan view. Fig. 3 is an endview ofthe washing tank and adjacent parts. Fig. 4- is a cross sectionof the parts shown in Fig. 3, taken on the line l-4 of Fig. 1. Fig. 5 isa cross section, showing the operating eccentrics and cams. Fig. 6 is across section on the line. 6-6 of Fig. 1*. Fig; 7 is a plan View of oneof the pumps, partly in section. Fig. 8 is a cross section on the line8-8 of Fig. 7. Fig. 9 is a cross section, on. the line 9+9 of Fig. 8,through one of the pump'heads, adjacent parts being shown in dottedlines. l ig. 10 is. a side view, on a larger scale, of

the lower part of one-of the operating ec-- centrics, the adjacent partsbeing shown in section. Fig. 111" is a crosssection on the line 11-11 ofFig. 10;. Fig.-12 is a side view of the ratchet wheel for moving thestrip of filtering material. and adjacent parts. Fig. 13 is an end viewof the same, partly in section.

In the drawing I have shown operating -means and a pump and filt er oneach side.

in actual use, however, it is designed to have two batteries offiltering pumps, one foreach side of the operating shaft.

.(irepresents the'operating shaft, having cams and eccentrics, b thepumps with movable heads, through which passes the filteringmedium 0which is an endless strip of cloth, woven wire or any suitable material.

The endless filter passes around. four rollers (l, e, f" and g, the lastbeing an idler and provided with adjustable bearings which may be movedby screws h, to take upthe slack. The filter strip passes down over theroller 6 into a washing tank 2', provided with an inclined bottom and adischarge portj at its lowest part, usually closedby a valve. with hotwater. The roller f is located partly within'and partly outside of thetank 91 and, in connection with the roller 7a, which is preferablycovered with rubber, forms a wringer, which insures that the filterstrip shall be clean and practically dry as it leaves the tank. Each ofthe rollers f and 7: isxprovided with a gear wheel, the two meshingtogether, so that the rollers revolve in unison. 1

The rollers d, e andf, are each provided witha sprocketwheel over whichruns a sprocketchainm. This chain also runs over a sprocket wheeln onthe shaft 0. On this shaft is fixed a ratchet wheel p, which isoperated-by the movement of the rod 9 in the following manner: On theshaft 0 is loosely mounted anarm 1", carrying a pawl s on its upper endand having its lower part providedwith along slot t, through whichpasses the headed pin it, provided with a thumb nut o, and carrying aroller w, loosely mounted thereon, this construction providing an easymeans of adjustment. -The arm 'is curved and bent upward near its end,forming a curve wadapted to engage the roller w, and a perforated blocky, similarly curved at z,iis adjustably secured to the rod near its endby the thumb nut 1. A retaining pawl (not shown) may be used toprevent"backward movement of the ratchet wheel 29.

Referring especially to Fig. 7, the pump 79' consists of a cylinderprovided at each end with perforated extensions 2,- 3, 4 and 5,

In use the tank is filled either made integral with the cylinder orsecured thereto. Through these extensions loosely pass the rods 6 and 7and the outer ends of these rods are provided with strong coiled springs8 encircling them and with adjustable nuts 9, said springs tending tohold the movable pump head firmly against one end of the cylinder whichis open at both ends. Firmly attached to each of the rods 6 and 7 is awasher or stop, such as 10, which limits the inward movement of the pumphead toward the cylinder. A packing 11, of rubber or other suitablematerial, is located in a groove in the end of the cylinder, to preventleakage.

The movable pump head is best shown in Figs. 8 and 9. It consists of abody portion 12, provided with strengthening ribs 13 and with perforatedears 14;, through which the rods 6 and 7 pass. On its inner face it isprovided with a series of vertical parallel ribs 15, leaving passagesbetween them which communicate with an annular groove 16. This groovedelivers into a discharge passage 17, from which the filtered liquid isdischarged into a funnel and led off to a receptacle, the funnel andreceptacle not being shown. The pump piston 18 consists of a cylinderopen at one end and closed at the other, both ends being suitablypacked, and connected to the piston rod 25. The pump cylinder isprovided with an opening 19, through which the liquid to be filteredfiows in by gravity or is forced in under pressure.

The operating means will next be described. On the shaft (1 is mountedan eccentric 20 for operating the pump pistons, cams 21 and 22 foroperating the pump heads and eccentrics 23 and 24 for operating a thefilter moving means. The piston rod 25 is connected to a cross head 26which slides in suitable guides in the main frame 27, which supports theoperating parts and the pumps on each side. Depending from the frame isthe guide frame 28 provided with braces 29. The frame 28 is providedwith guide grooves 30, in which slides the cross head 31, which isconnected to the eccentric 20. Pivotally attached to the cross head 81are'two parallel arms 32 and 33, which con-v nect the cross heads 26 and81, the construction being the same on both sides of the main shaft.From this construction it is obvious that the motion of the eccentric20, which causes the cross head 31 to rise and fall, will in turnreciprocate the cross head 26 at intervals. The parts are soproportioned that the piston 18, which is moved by the cross head 26, iscaused to move back and forth at intervals, but with a dwell at certaintimes.

The piston heads are operated in the following manner: The cams 21 and22, on the Shaft a, contact with rollers, such as 3 1, on

the arms 35 and 36. On the frame 27 is a perforated extension 37 throughwhich passes a rod 38 having a hooked end engaging a pin 39 on the arm35. A spring 40 surrounds the rod 38 and holds the roller 34: always incontact with the cam 21, a similar construction being applied to the arm36. The arm has its outer end enlarged into a T, the whole forming adouble bell crank lever, which is pivoted at 41 on the frame 27. To theupper part of this T is pivoted a link 412, the other end of which ispivoted to the rod 7, the construction being the same as to the arm 36.From this construction it is evident that the rotation of the shaft awill open and close the cylinder head 12 at intervals and the parts areso proportioned that there is a dwell. between these movements. hecylinder head on the right hand pump is also operated by the movement ofthe arms and 36 as follows: To the lower end of the T head of the arm 35is pivotally attached a long red +13, the other end of which is pivotedto the sliding rod 4:41 attached to the cylinder head, the constructionon both sides of the pump being the From this construction, it isevident that the cams 21 and are so placed on power shaft so theirrotation will open the cylinder heads of the two units simultaneously,and are so placed as to close them also simul taneously. The two camsare so constructed'as to produce the dwell. of the motion at the propertime simultaneously for each end. The eccentric 21 is connected to therod 9 and operates the ratchet wheel 7 by the connections alreadydescribed. By a similar construction the eccentric 23 operates theratchet wheel on the opposite side.

The operation is as follows: The parts being in the position shown inFig. 7, the main shaft (6 is set in motion the piston 18 is drawn to theright and the cylinder head 12 simultaneously drawn to the left.Immediately afterward the ratchet; wheel 7) is operated, feeding a freshportion of the filter hand between the cylinder head and the cylinder.Just as the piston is about to uncover the inlet opening 19, thecylinder head is closed, the feeding of the filter band havingpreviously been stopped. \Vhen the opening 19 is free the liquid to befiltered runs into the cylinder 18. On the return stroke of the pistonthe liquid is forced through the filter band, running out through thepassage 17 and the cycle of operations is repeated indefinitely, thefilter band being cleaned as above described. The same cycles ofoperation take place at both ends and are simultaneous.

lVhile I have thus described my invention, I wish it to be expresslyunderstood that I do not limit myself to the exact. constructiondescribed and shown, as this could be varied 1 said band between saidpump and its head greatly without departing from the spirit of myinvention. l

I claim z 1. In a mechanical filter, the combination of a pump, a filterband and means for operating said pump and feeding a fresh portion ofsaid band into operative relation with said pump atintervals by a stepby step movement, substantially as described.

In a mechanical filter. the combination of a pump, having a movablehead, a filter band and meansfor operating said pump and feeding a freshportion of said hand between the pump and its head at intervals,substantially-as described.

3. In a mechanical filter, the combination of a pump having a movablehead, an end-- less filter band adapted to be clamped at intervalsbetween the pump and its head, means for operating said pump and itshead and means for feeding a fresh portion of at intervals,substantially as described.

4. In a mechanical filter, the combination of a pump, an endless filterband, means for cleansing the used portion of said band and means foroperating said pump and feeding said band to expose fresh, cleanfiltering surfaces at intervals by a step by step movement to the actionof the liquid moved by said pump, substantially as described.

5. In a mechanical filter, the combination of a pump having a movablehead, an endless filter band adapted to be fed between said pump and itshead and means for simul taneously moving said head away from said pumpand feeding a fresh portion of said filter band between said pump andits head, substantially as described.

6. In a mechanical filter, the combination of a pump having a movablehead, an endless filter band, devices for cleansing said band, and meansfor simultaneously moving said head away from the pump and feeding afresh portion of said filter band between the pump and its head,substantially as described.

7. In a mechanical filter, the combination of an endless filter band,means for forcing a liquid under treatment through successive portionsof said band, devices for cleansing band and means for simultaneouslyclosing said head and operating said pump, substantially as described.

9. In a mechanical filter, the combination of a puinp having a movablehead, an endlessfilter band, means for simultaneously 'IHOVlH said headand feedin a fresh )ortion of said band between said pump and its head,means for simultaneously closing said head and operating said pump, and

devices for cleansing said band, substantially as described.

10. Ina mecnanlcal filter, the combination of an endless filter band, apump having a movable head provided with means for the escape ofliquids, means for simultaneously moving said head and feeding a freshportion of said band between said pump and its head, and devices forcleansing said band, substantially as described.

1 II"; In a mechanical filter, the combination of a pump, having amovable head, an endless filter band, means for feeding said bandbetween said pump and its head at intervals and. devices for cleansingand drying. said band in its movement, substantially as described.

- 1 2. In a mechanical filter, the combination of an operating shaftprovided with eccentrics and cams, a pump having a movable head and apiston, an endless filter band, and devices driven by said eccentricsand cams for coordinately moving said head, piston and band,substantially as described.

In testimony whereof, I aflix my signature, in presence of twowitnesses.

JOHN G. BREWER. lVitnesses J ULES Gooonaos, FERDINAND E. Lawn.

